MMT/超支化PA6纳米复合材料的制备及性能
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摘要
首先采用原位聚合法制备蒙脱土/超支化聚酰胺6 (PA6)纳米复合材料,然后流延成膜。利用自动黏度仪、傅里叶红外光谱仪、热重分析仪、毛细管流变仪、旋转流变仪、力学万能试验机等对蒙脱土/超支化PA6纳米复合材料进行表征。研究表明,上述纳米复合材料的剪切黏度与剪切速率的流变曲线符合幂律流体的特征,便于成型加工;随着蒙脱土(MMT)加入基体,上述纳米复合材料的热稳定性显著增加。将蒙脱土/超支化PA6纳米复合材料经流延制备成膜,薄膜的拉伸强度和断裂伸长率分别较纯超支化PA6薄膜提高20. 1 MPa和92%。
The montmorillonite/hyperbranched PA6 nanocomposites were prepared by the method of in-situ polymerization, and then the film was formed by flow. Montmorillonite/hyperbranched PA6 nanocomposites were characterized by automatic viscosity tester, fourier infrared spectrometer, thermo gravimetric analysis, capillary rheometer, rotational rheometer and universal mechanical testing machine.The results show that the rheological curves of shear viscosity and shear rate of the nanocomposites confirm to the characteristics of power-law fluid,which is convenient for shaping. As the addition of MMT into the matrix,the thermal stability of nanocomposites increases significantly. The tensile strength and elongation at break of the films of montmorillonite/hyperbranched PA6 nanocomposite prepared by flow coating are20. 1 MPa and 92% higher than the pure hyperbranched PA6 films,respectively.
The montmorillonite/hyperbranched PA6 nanocomposites were prepared by the method of in-situ polymerization, and then the film was formed by flow. Montmorillonite/hyperbranched PA6 nanocomposites were characterized by automatic viscosity tester, fourier infrared spectrometer, thermo gravimetric analysis, capillary rheometer, rotational rheometer and universal mechanical testing machine.The results show that the rheological curves of shear viscosity and shear rate of the nanocomposites confirm to the characteristics of power-law fluid,which is convenient for shaping. As the addition of MMT into the matrix,the thermal stability of nanocomposites increases significantly. The tensile strength and elongation at break of the films of montmorillonite/hyperbranched PA6 nanocomposite prepared by flow coating are20. 1 MPa and 92% higher than the pure hyperbranched PA6 films,respectively.
引文
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[2]张伟,吴玉成,孙圳.高流动性增韧尼龙66材料的研究[J].塑料工业,2017,45(6):36-38.
[3]孙涛.新型聚酰胺树脂的合成及应用[D].上海:东华大学,2009.
[4] ZHANG G,ZHOU Y X,KONG Y,et al. Semiaromatic polyamides containing ether and different numbers of methylene(2-10)units:Synthesis and properties[J].RSC Adv,2014,4:63006-63015.
[5]郭强,杨克俭,刘京力,等.高流动性尼龙6的增强增韧改性研究[J].塑料工业,2014,42(7):43-46.
[6]张帆.高流动性尼龙6的合成及结晶动力学研究[D].长沙:湖南大学,2008.
[7]郑兴铭,胡天辉,杨克俭,等.高流动性尼龙6的制备与表征[J].塑料工业,2012,40(5):45-47.
[8] ZHANG F,ZHOU L,LIU Y,et al. High-flow nylon 6 by in situ polymerization:Synthesis and characterization[J]. J Appl Polym Sci,2010,108(4):2365-2372.
[9] FUKUSHIMA Y,INAGAKI S. Synthesis of an intercalated compound of montmorillonite and 6-polyamide[J]. J Inclusion Phenom,1987,5(4):473-482.
[10] KOJIMA Y,USUKI A,KAWASUMI M,et al. Synthesis of nylon 6-clay hybrid[J]. J Mater Res,1993,8(5):1179-1184.
[11] KOJIMA Y,USUKI A,KAWASUMI M,et al. Synthesis of nylon 6-clay hybrid by montmorillonite intercalated withε-caprolactam[J]. J Polym Sci, Part A:Polym Chem,1993,31(4):983-986.
[12] GANβM,SATAPATHY B K,THUNGA M,et al. Morphology and mechanical response of S–B star block copolymer layered silicate nanocomposites[J]. Eur Polym J,2009,45(9):2549-2563.
[13] VARGHESE S,KARGER-KOCSIS J,GATOS K G. Melt compounded epoxidized natural rubber/layered silicate nanocomposites:Structure-properties relationships[J].Polymer,2003,44(14):3977-3983.
[14] ZHONG Y,ZHU Z,WANG S Q. Synthesis and rheological properties of polystyrene/layered silicate nanocomposite[J]. Polymer,2005,46(9):3006-3013.
[15]吴其晔,巫静安.高分子材料流变学[M].北京:高等教育出版社,2002.
[16]刘跃军,冯正洋,戴红.支化聚酯酰胺共聚物的合成、表征及相关性能研究[J].高校化学工程学报,2017,31(3):650-656.